Forming mold convenient to demold
By setting up an adjustable height top plate and a closely fit tapered surface structure in the lower mold of the mold, the damage problem of existing molds to the outer surface of the long cylindrical workpiece during demoulding is solved, and a more efficient and safer demoulding process is achieved.
Patent Information
- Application Number
- CN202421203221.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-29
AI Technical Summary
When the existing mold is demolded, it is easy to cause damage to the outer surface of the long cylindrical workpiece, resulting in production troubles.
A mold structure including an upper mold and a lower mold is designed. The lower mold is equipped with an adjustable height top plate and a die core. When the mold is closed, the second conical surface on the top plate is closely connected to the first conical surface on the die core to form a mold cavity to ensure that the product is subjected to uniform force during demolding.
By setting up an adjustable height top plate, the stress area and efficiency of the product when demolding is improved, damage to the product appearance is avoided, and it is highly practical.
Smart Images
Figure CN222590589U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mold structure, in particular to a molding mold which is convenient for demolding. Background Art
[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. Injection molds are a type of mold that is widely used.
[0003] For existing molds, during demoulding, the ejector pin of the ejection mechanism is generally used to eject the product. However, for long cylindrical workpieces, after the workpiece is formed, there is still a certain bonding force between the workpiece and the mold core. Directly using the ejector pin to eject the product can easily damage the outer surface of the product, causing trouble for the manufacturer. Utility Model Content
[0004] Based on this, it is necessary to provide a molding die that is easy to demold in order to address the deficiencies in the prior art.
[0005] The technical scheme of the utility model is: a mold for easy demolding, comprising an upper mold and a lower mold, the upper mold comprising a panel, a positioning frame mounted on the panel, an upper mold core mounted inside the positioning frame, the lower mold comprising a bottom plate, a support plate mounted on the bottom plate, a fixed plate mounted on the support plate, a top plate arranged above the fixed plate and capable of height adjustment, a mold core mounted on the fixed plate and passing through the top plate, and a plurality of side mold cores slidably arranged on the top plate, the mold core comprising a fixed section, a functional section and a molding section, the fixed section, the functional section and the molding section are arranged in sequence from bottom to top, the fixed section of the mold core is mounted on the fixed plate, the functional section is provided with a first conical surface which gradually shrinks from bottom to top; a through hole is provided in the middle of the top plate, the aperture of the through hole gradually shrinks from bottom to top, thereby forming a second conical surface, when the mold is closed, the second conical surface on the top plate is tightly fitted with the first conical surface on the mold core, and a mold cavity is enclosed between the upper mold core, the side mold core, the top plate and the molding section of the mold core.
[0006] In one of the embodiments, the positioning frame is provided with an inner groove, which extends upward from the bottom surface of the positioning frame, and the positioning frame is also provided with a plurality of positioning grooves, which extend upward from the bottom surface of the positioning frame, and are evenly spaced around the inner groove, and the positioning grooves are connected to each other in the horizontal direction.
[0007] In one of the embodiments, the side mold cores correspond to the positioning grooves one by one, and the side mold cores are surrounded on the outside of the mold core.
[0008] In one of the embodiments, mounting grooves are provided at both sides of the positioning groove at the bottom of the positioning frame, and the upper mold further includes a plurality of groups of positioning blocks and a plurality of fixing parts. The two positioning blocks in the same group are respectively installed in the two mounting grooves through the fixing parts, and the positioning blocks are provided with latching protrusions, which extend into the inner positioning groove.
[0009] In one of the embodiments, oblique guide grooves are provided at positions on both sides of the side mold core corresponding to the clamping protrusions, and the oblique guide grooves are inclined outward from top to bottom. When the mold is closed, the clamping protrusions press the groove walls of the oblique guide grooves inward.
[0010] In one of the embodiments, the groove wall of the positioning groove away from the inner groove is inclined inward from bottom to top to form a first side pushing surface, and a second side pushing surface is provided on the side mold core, corresponding to the first side pushing surface.
[0011] In one of the embodiments, the lower mold is also provided with a plurality of guide devices, and the guide devices correspond to the side mold cores one by one, and the guide devices guide the side mold cores in the horizontal direction.
[0012] The utility model has the beneficial effect of facilitating demoulding of the molding mold in that: by arranging a top plate that can be adjusted in height, during demoulding, an external driving device drives the top plate to move upward, and during the upward movement of the top plate, the product is simultaneously pushed to gradually withdraw from the molding section of the mold core, thereby effectively increasing the force area of the product during demoulding, improving the demoulding efficiency, and ensuring the integrity of the product appearance, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the structure of the mold for facilitating demolding of the utility model;
[0014] Figure 2 for Figure 1 An exploded view of the molding die is shown to facilitate demolding;
[0015] Figure 3 for Figure 1 The schematic diagram of the structure of the positioning frame of the molding die for facilitating demolding is shown;
[0016] Figure 4 It is a schematic structural diagram of the mold core of the lower mold of the utility model for facilitating demolding;
[0017] Figure 5 This is a cross-sectional view of the utility model for facilitating demolding of the molding die. DETAILED DESCRIPTION
[0018] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0024] See also Figures 1 to 5 The utility model provides a molding die that is easy to demold, including an upper die 10 and a lower die 20 , wherein the upper die 10 and the lower die 20 together form a film cavity for molding a workpiece 100 .
[0025] The upper mold 10 includes a panel 11, a positioning frame 12 installed on the panel 11, and an upper mold core 13 installed inside the positioning frame 12. The positioning frame 12 is provided with an inner groove 121, which extends upward from the bottom surface of the positioning frame 12, and the positioning frame 12 is also provided with a plurality of positioning grooves 122, which extend upward from the bottom surface of the positioning frame 12, and the positioning grooves 122 are evenly spaced around the inner groove 121, and the positioning grooves 122 are connected to each other in the horizontal direction, and the groove wall of the positioning groove 122 away from the inner groove 121 is inclined inward from bottom to top to form a first side push surface 123.
[0026] The bottom of the positioning frame 12 is provided with mounting grooves on both sides of the positioning groove 122. The upper mold 10 also includes a plurality of groups of positioning blocks 14 and a plurality of fixing members 15. The two positioning blocks 14 of the same group are respectively installed in the two mounting grooves through the fixing members 15, and the positioning blocks 14 are provided with a clamping protrusion 141, which extends into the inner positioning groove 122.
[0027] The lower mold 20 includes a bottom plate 21, a support plate 22 mounted on the bottom plate 21, a fixed plate 23 mounted on the support plate 22, a top plate 24 disposed above the fixed plate 23 and capable of adjusting its height, a mold core 26 mounted on the fixed plate 23 and passing through the top plate 24, and a plurality of side mold cores 25 slidably mounted on the top plate 24, wherein inclined guide grooves 251 are disposed at both sides of the side mold cores 25 corresponding to the protrusions 141, and the inclined guide grooves 251 are inclined outwardly in a top-down direction.
[0028] In this embodiment, there are four side mold cores 25 , and the side mold cores 25 correspond to the positioning grooves 122 one by one. A second side push surface 252 is provided on the side mold core 25 , corresponding to the first side push surface 123 , and the side mold cores 25 are enclosed on the outside of the mold core 26 .
[0029] The mold core 26 includes a fixed section 261, a functional section 262 and a molding section 263, which are arranged in sequence from bottom to top. The fixed section 261 of the mold core 26 is installed on the fixed plate 23, and the functional section 262 is provided with a first tapered surface 2621 that gradually shrinks from bottom to top. A through hole is provided in the middle of the top plate 24, and the aperture of the through hole gradually shrinks from bottom to top, thereby forming a second tapered surface 241.
[0030] In addition, the lower mold 20 is also provided with a plurality of guide devices 27, and the guide devices 27 correspond to the side mold cores 25 one by one. The guide devices 27 guide the side mold cores 25 in the horizontal direction, so that the side mold cores 25 are displaced in a straight line, and the demolding mold also includes a plurality of springs for the convenience of mold demolding. When the mold is in the open mold state, the springs limit the side mold cores 25 to prevent the side mold cores 25 from shifting, and ensure that when the side mold cores 25 are in the closed mold state, the cam 141 and the inclined guide groove 251 are accurately aligned, and the cam 141 can be inserted into the inclined guide groove 251. When the mold is in the closed mold state, the springs elastically contract.
[0031] When the mold is closed, the upper mold 10 is pressed down until the bottom surface of the positioning frame 12 fits with the upper end surface of the positioning plate, and the top plate 24 is clamped between the positioning frame 12 and the fixed plate 23. The second conical surface 241 on the top plate 24 fits tightly with the first conical surface 2621 on the mold core 26. During the pressing process of the upper mold 10, the clamping protrusion 141 presses the groove wall of the inclined guide groove 251 inward, and the first side push surface 123 of the positioning frame 12 presses the second side push surface 252 of the side mold core 25 inward, so that the side mold cores 25 move closer to the mold core 26. After the mold is closed, the inner side surface of the side mold core 25 and the outer side surface of the mold core 26 are separated by a certain distance, and the upper mold core 13, the side mold core 25, the top plate 24 and the molding section 263 of the mold core 26 are surrounded by a mold cavity, and injection molding is performed in the mold cavity to form a product.
[0032] When the mold is opened, the upper mold 10 moves upward, and the protrusion 141 presses the groove wall of the inclined guide groove 251 outward, so that the side mold core 25 moves away from the product. When demolding, the external driving device drives the top plate 24 to move upward. During the upward displacement of the top plate 24, the product is simultaneously pushed to gradually exit from the molding section 263 of the mold core 26.
[0033] The utility model has the beneficial effect of facilitating demoulding of the molding mold in that: by providing a top plate 24 that can be adjusted in height, during demoulding, an external driving device drives the top plate 24 to move upward, and during the upward movement of the top plate 24, the product is simultaneously pushed to gradually withdraw from the molding section 263 of the mold core 26, thereby effectively increasing the force area of the product during demoulding, improving the demoulding efficiency, and ensuring the integrity of the product appearance, and having strong practicality.
[0034] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A mold for easy demolding, comprising an upper mold and a lower mold, characterized in that: The upper mold includes a panel, a positioning frame installed on the panel, and an upper mold core installed inside the positioning frame. The lower mold includes a bottom plate, a support plate installed on the bottom plate, a fixed plate installed on the support plate, a top plate arranged above the fixed plate and capable of adjusting height, a mold core installed on the fixed plate and passing through the top plate, and a plurality of side mold cores slidably arranged on the top plate. The mold core includes a fixed section, a functional section and a molding section, and the fixed section, the functional section and the molding section are arranged in sequence from bottom to top. The fixed section of the mold core is installed on the fixed plate, and the functional section is provided with a first conical surface which gradually shrinks from bottom to top. A through hole is provided in the middle of the top plate, and the aperture of the through hole gradually shrinks from bottom to top, thereby forming a second conical surface. When the mold is closed, the second conical surface on the top plate is tightly fitted with the first conical surface on the mold core, and a mold cavity is enclosed between the upper mold core, the side mold core, the top plate and the molding section of the mold core.
2. The easy-to-release mold according to claim 1, characterized in that: The positioning frame is provided with an inner groove, which extends upward from the bottom surface of the positioning frame, and the positioning frame is also provided with a plurality of positioning grooves, which extend upward from the bottom surface of the positioning frame, are evenly spaced around the inner groove, and are connected to each other in the horizontal direction.
3. The easy-to-release mold according to claim 2, characterized in that: The side mold cores correspond to the positioning grooves one by one, and the side mold cores are surrounded on the outside of the mold core.
4. The easy-to-release mold according to claim 2, characterized in that: The bottom of the positioning frame is provided with mounting grooves on both sides of the positioning groove. The upper mold also includes several groups of positioning blocks and several fixing parts. The two positioning blocks in the same group are respectively installed in the two mounting grooves through the fixing parts, and the positioning blocks are provided with clamping protrusions, which extend into the inner positioning groove.
5. The easy-to-release mold according to claim 4, characterized in that: The side mold core has inclined guide grooves at positions corresponding to the clamping protrusions on both sides thereof. The inclined guide grooves are inclined outwardly from top to bottom. When the mold is closed, the clamping protrusions press the groove walls of the inclined guide grooves inwardly.
6. The easy-to-release mold according to claim 2, characterized in that: The groove wall of the positioning groove away from the inner groove is inclined inward from bottom to top to form a first side pushing surface. The side mold core is provided with a second side pushing surface corresponding to the first side pushing surface.
7. The easy-to-release mold according to claim 1, characterized in that: The lower mold is also provided with a plurality of guide devices, and the guide devices correspond to the side mold cores one by one, and the guide devices guide the side mold cores in the horizontal direction.